Question 13.6: The box below shows a system at equilibrium. It has a volume...

The box below shows a system at equilibrium. It has a volume of 0.50 L and the symbol represents 0.10 mol of a weak acid, HB. The symbol represents 0.10 mol of the conjugate base, B^{-}. Hydronium ions and water molecules are not shown. What is the percent ionization of the acid?

STRATEGY

1. Since there are 4 red circles (HB) and 1 blue circle (B^{-}) at equilibrium, there must have been 5 red circles to start with.
2. Substitute into Equation 13.7.
\% \>ionization =\frac{ [\>\> ]_{eq}}{[\>\> ]_{o}} \times 100